LT1632 LINER [Linear Technology], LT1632 Datasheet - Page 16

• Manufacturer Part Number: LT1632
• Description: 45MHz, 45V/us, Dual/Quad Rail-to-Rail Input and Output Precision Op Amps
• Manufacturer: LINER [Linear Technology]

TYPICAL
RELATED PARTS
LT1632/LT1633
Tunable Q Notch Filter
A single supply, tunable Q notch filter as shown in Figure
5 is built with LT1632 to maximize the output swing. The
filter has a gain of 2, and the notch frequency (f
the values of R and C. The resistors R10 and R11 set up the
DC level at the output. The Q factor can be adjusted by
varying the value of R8. The higher value of R8 will
PART NUMBER
LT1211/LT1212
LT1213/LT1214
LT1215/LT1216
LT1498/LT1499
LT1630/LT1631
C-Load is a trademark of Linear Technology Corporation.
16
4.7 F
C2
V
R10
IN
10k
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
5V
2.2 F
R11
10k
C1
R9
1k
APPLICATION
Dual/Quad 14MHz, 7V/ s, Single Supply Precision Op Amps
Dual/Quad 28MHz, 12V/ s, Single Supply Precision Op Amps
Dual/Quad 23MHz, 50V/ s, Single Supply Precision Op Amps
Dual/Quad 10MHz, 6V/ s Rail-to-Rail Input and Output
Dual/Quad 30MHz, 10V/ s Rail-to-Rail Input and Output Op Amps
DESCRIPTON
C-Load
R1
500
–
1/2 LT1632
+
TM
1000pF
1.62k
A2
Op Amps
R2
1k
Figure 5. Tunable Q Notch Filter
R
C
R
1.62k
R8
C
1000pF
5k
U
R5
1k
C5
4.7 F
+
–
1/2 LT1632
A1
R6
5V
1k
O
) is set by
1632/33 F05
R7
1k
V
OUT
R
C
f
V
A
O
O DC
V
1 62
1000
2
2
decrease Q as depicted in Figure 6, because the output
induces less of feedback to amplifier A2. The value of R7
should be equal or greater than R9 to prevent oscillation.
If R8 is a short and R9 is larger than R7, then the positive
feedback from the output will create phase inversion at the
output of amplifier A2, which will lead to oscillation.
1
RC
k
pF
5
V
R
11
R
11
R
COMMENTS
Input Common Mode Includes Ground, 275 V V
6 V/ C Max Drift, Max Supply Current 1.8mA per Op Amp
Input Common Mode Includes Ground, 275 V V
6 V/ C Max Drift, Max Supply Current 3.5mA per Op Amp
Input Common Mode Includes Ground, 450 V V
6 V/ C Max Drift, Max Supply Current 6.6mA per Op Amp
High DC Accuracy, 475 V V
Max Supply Current 2.2mA per Amp
High DC Accuracy, 525 V V
Max Supply Current 4.4mA per Amp
10
2 5
V
–20
–40
40
20
0
0
Figure 6. Frequency Response
20 40 60
OS(MAX)
OS(MAX)
DECREASING R8
LINEAR TECHNOLOGY CORPORATION 1998
16323f LT/TP 0998 4K • PRINTED IN USA
, 4 V/ C Max Drift,
, 70mA Output Current,
FREQUENCY (kHz)
INCREASING R8
80 100 120
OS(MAX)
OS(MAX)
OS(MAX)
140 160 180 200
13632/33 F06
,
,
,